Bus Type: X1 PCI-Express Internal Connector: 2 x SATA II Female Supports RAID levels 0, 1, 0+1, 5, 10 and JBOD Port Multiplier and NCQ (Native Command Queuing) support Supports \"Non booting\" drivers for Mac OS X v.10.4 Supplied with extra low profile bracket Software compatibility: 32/64 bit support for Windows 2000/XP/Vista/Windows 7/8/Server 2003, 2008 , Linux, Supports \'Non booting\' drivers up to Mac OS v.10.6 Warranty: 2 years To use RAID 5 function requires an enclosure with a minimum of 3 x HDD and a SATA port Mulitplier, part number51136.